Caroline Holden, Stephanie's sister comes to Baywatch. She meets Stephanie when she falls off some rocks while watching Stephanie when she is testing a new wave-runner. She tells Stephanie that she is engaged to a man named Frank Randall. He is an environmentalist, and dives looking for pollutions. When he is collecting underwater soil samples, he is attacked by two men. They force him to reach the surface at high speed. Therefore he gets the decompression sickness and ends up in a decompression chamber, clinging for his life. Caroline is devastated and tells Stephanie to go to Frank's house and get her some clothes.
This long-running series follows the adventures of a team of lifeguards on the crowded beaches of Los Angeles County. Veteran lifeguard Mitch Buchannon watches over the younger lifeguards that come and go with each passing season as they keep the beaches safe for vacationers. Frequently he must take action to save them from the raging seas and from the raging tempers that sometimes flare up between the young guards in this stressful job.